It so happens that sometimes things become watery after washing. Don't worry: your problem can be solved if you use small tricks.
Mix 1 tbsp. l. salt, grated household soap, citric acid and starch. Apply the paste to the affected area, leave it for 12 hours, and then wash it off.
Soak the affected items in hot water with ammonia (1 teaspoon per 1 liter of water) for 1 hour.
Soak faded clothes in hot water with a large amount of washing powder and bleach for 2-3 hours. This works well if the white stuff has turned semi-colored. Then wash them by hand and rinse well. You can do the same, but then do not wash, but boil.
Sometimes it is enough to simply wash faded clothes again.
After all, if it is not possible to save faded things, they can be repainted, but in darker colors.
As you can see, there are reliable ways to fix the situation, the main thing is to try!